Overview
Ricoh GXR
The innovative camera system.
GXR is a new camera system that consists of a body and
camera units. Each camera unit contains a lens (focal lengths differ between
units), an image sensor of optimum type and size for the unit, and an image
processing engine. By changing units, the photographer can handle a diverse
range of scenes in a way that satisfies sophisticated requirements for photo
expression. The slide mechanism adopted for attaching and removing camera units
enables changes to be made quickly and securely.
Compact, high-performance lens
design.
It is the lens that gives life to the photograph. In
interchangeable lens camera systems up to now, the distance from the mount and
the back of the lens to the sensor image plane was subject to requirements for
flange back distance and back focal length. This made it difficult to achieve
both compactness and high optical performance. Eliminating the lens mount,
however, means that the back focal length can be freely defined for the GXR, enabling
the new system to use the most optically efficient lens designs and giving it
excellent potential for future expansion. This practical concept has given
birth to camera units that achieve compact size without compromising image
quality.
Optimum tuning to realize all the
capabilities of the lens and the image sensor
In order to
make the best use of the inherent power of the lens and the image sensor, the
ideal solution is to combine both in a single unit. Consider, for example, the
low-pass filter covering the surface of the image sensor. The dilemma faced is
that while the filter helps prevent colour noise and colour moiré, increasing
this benefit results in an ever greater sacrifice in lens resolution.
Traditional interchangeable lens systems use a single low-pass filter for all
lenses so they are unable to avoid situations where the filter effect is
excessive or inadequate. With the GXR, on the other hand, we can design a
filter optimized for the resolution of the specific lens. In this way, Ricoh has
succeeded in effectively preventing colour noise while suppressing filter
influence on lens resolution.
Highly airtight system for superior
dust proofing
The ease with which dust can adhere to image sensors has
been a system problem for interchangeable lens digital cameras up to now. In
the case of GXR camera units, however, the lens and the image sensor are
integrated into a single unit. This structure makes it difficult for dust to
get in since it is not necessary to expose the inside of the camera when
changing lenses. In addition, the inside of the units are highly airtight with
light-shielded walls. Even in highly dusty shooting environments, camera units
can be changed without hesitation.
Slide mechanism for high precision
and reliability
In a relationship
similar to that of an SLR and its lens mount, the guide rail is a defining
characteristic of the GXR system. In order to create a highly reliable slide
mechanism, stainless steel with superior strength and corrosion resistance was
adopted for the rails. Surface hardness and wear resistance were further
enhanced with a soft-nitriding process, the end result being a high-precision
slide that enables secure attachment and removal. The combination of the slide,
the resin components, and the pressure-welded springs give an appropriate
sliding feel and quietness. In the development, high-stress attachment/removal
testing was done to verify the reliability of both mechanical and electrical
connections.
Magnesium alloy exterior
Both the
body and the camera units utilize a magnesium alloy exterior. Light, strong,
and exhibiting superior precision-molding, heat-dissipation, and
magnetic-shielding characteristics, magnesium alloy is an ideal material for
digital cameras. With a non-slip "pear-skin" baked finish for both
corrosion resistance and a high-class feel, the GXR exterior achieves
durability, reliability, and high-class impression.
Specifications
GXR External Body
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Flash
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Mode
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Auto (flash fires when lighting is poor or subject is
backlit), red-eye, on, slow sync, manual, off
|
|
Range (built-in flash)
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Refer to
camera unit specifications.
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|
Flash compensation
|
±2.0 EV in increments of 1/2EV or 1/3EV
|
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Manual flash amount
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FULL, 1/1.4, 1/2, 1/2.8, 1/4, 1/5.6, 1/8, 1/11, 1/16,
1/22, 1/32, 1/64
|
|
Picture display
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3.0" transparent LCD; approx. 920,000 pixels
|
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Shooting mode
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Auto, program shift, aperture priority, shutter priority,
manual, scene (movie, portrait, sports, landscape, nightscape, skew
correction), " My Settings"
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Picture quality
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Fine, Normal, RAW (DNG) *1
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Storage
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SD/SDHC memory card, internal memory (approx. 86 MB)
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File size
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Refer to camera unit specifications.
|
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File format
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Photographs
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JPEG (Exif Ver. 2.21) *2, RAW (DNG)
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Movies
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AVI *3(Open DML Motion JPEG compliant)
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Compression
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JPEG baseline compliant (photographs and movies)
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Other shooting options
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Continuous shooting (continuous, M-Cont Plus); self-timer
(shutter release delay of approx. 10 s or 2 s, or custom setting); interval
timer (intervals of 5 s to 1 hour in increments of 5 s)*4 color
bracketing; B&W (TE); color space selection; noise reduction; histogram
display; framing grid; depth-of-field indicator; tilt indicator; hot shoe
|
|
Other playback options
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Auto image rotation (when camera unit attached);
multi-frame playback; playback zoom (up to 16x); resize
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Interface
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USB 2.0 (High-Speed) Mini-B connector; Mass Storage *5;
AV output (NTSC), HDMI connector (Mini HDMI Type C)
|
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Video signal format
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NTSC, PAL
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Power source
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DB-90 rechargeable battery (3.6V)
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Battery life
|
Refer to camera unit specifications.
|
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Dimensions (W x H x D)
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113.9 mm x 70.2 mm x 37.5 mm (excluding projections)
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Weight
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Camera body (excluding battery, memory card, neck strap,
and connector cap): 160 g
Battery, neck strap, and connector cap: 66 g
|
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Tripod screw hole
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1/4-20UNC
|
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Operating temperature
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0 °C to 40 °C
|
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Date storage time
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Approx. 1 week
|
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Operating humidity
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85% or less
|
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Storage temperature
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-20 °C to 60 °C
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1 A JPEG file is also recorded (the
JPEG file may be a fine or normal quality file with the same dimensions as the
RAW file or a VGA file). RAW files use the standard DNG format promoted by
Adobe Systems Incorporated
2 Compatible with the Design rule for Camera
File system (DCF, a JEITA standard) and DPOF.
Full compatibility with other
devices is not guaranteed.
3 Audio: PCM 32 kHz, 16 bit monaural.
4 Flash off.
5 Mass Storage is supported under
Windows 2000, Windows XP, Windows Vista®, Windows® 7, and
Mac OS 9.0-9.2.2, Mac OS X 10.1.2-10.6.4.
Overview
GR A12 28mm f2.5 Lens
With this
28 mm fixed focal length lens, the more pictures you take, the more you will
experience the joy of expressing yourself through photography. Why? Because
this is a camera unit that can handle both a quick-shooting style and a slower
style that aims for expressive images emphasizing perspective. Deep depth of
field enables pan-focus shooting by stopping down the aperture. The
satisfaction of being able to trip the shutter the instant the camera is
pointed is one of the attractions of a wide-angle lens. At the same time, there
are also dynamic composition possibilities, such as getting in close so the
subject is large while an expansive background stretches out behind. With
ordinary wide-angle lenses there are problems with image degradation near the
edge, but by giving top priority to image quality in the design, such worries have
been eliminated in A12 28mm lens. This is an excellent choice for use as your
regular lens.
Feature a
newly developed 6-group, 9-element configuration, the use of two aspherical
lenses as well as a special low-dispersion lens has made it possible to
effectively correct for various types of aberrations. The wide-angle lens
phenomena of image degradation and loss of resolution and contrast at the
periphery have been suppressed to provide sharp image depiction across the
entire photo. In addition, the adoption of a floating lens structure has made
it possible to provide superior optical performance at all focal distances.
The larger
the image sensor, the more beautiful the bokeh and the greater the expressive
power for a sense of atmosphere and three-dimensionality in the image. The lens
has a large 23.6 × 15.7 mm CMOS sensor. With this ample APS-C size, you can
take full advantage of the optical performance of the lens. Widen your range of
expression with techniques such as shooting with the large F2.5 aperture wide
open to blur the background. GR ENGINE III is featured as the image processing
engine. Through its intelligent processing of the rich image data provided by
the high-performance lens and large image sensor creates low-noise,
high-quality images with superior tone gradations and resolution.
The speed
at which the image sensor output signal is read has become a bottleneck for
speeding up AF done using the contrast AF technique in which the image sensor
does the focus detection. The CMOS sensor can handle accelerated AF speeds. The
adoption of a new drive mode has also contributed to this camera unit’s quick,
satisfying AF. When spot AF is selected, a “pinpoint” setting can be utilized
for the AF area. The resulting smaller-than-normal AF area lets you precisely
focus on a single point.
Nimble
continuous shooting functions shoot at up to 4 frames/sec. even when RAW image
size is selected (noise reduction set to “Off” or “Weak”). The shooting of high
definition (HD) movies up to a size of 1280×720 (aspect ratio 16:9; frame rate
24 frames/sec.) is also possible.
With the
manual focus ring, you can smoothly make fine focus adjustments after AF
focusing is done. Focus quickly and easily even when moving up close to the
subject and shooting at a wide-open F2.5 aperture to get beautiful bokeh. *GR
LENS A12 28mm F2.5 does not have macro shooting, macro target, auto macro, or
macro minimum shooting distance display functions.
Since
high-quality images are possible even with ISO sensitivity set quite high,
you can obtain beautiful pictures even in nightscape and indoor shooting.
Specifications
GR A12 28mm f2.5 Lens
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Effective
pixels
|
Approximately
12.30 million
|
|
Image
sensor
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23.6×15.7mm
CMOS sensor (total pixels: 12.90 million pixels)
|
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Lens
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Focal
length
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18.3mm (35
mm camera equivalent: 28 mm)
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Aperture
(f-number)
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f/2.5 –
f/22 (ND filter used with apertures for exposure control when f/22 is
displayed in auto shooting mode)
|
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Focus
range
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Approx. 20
cm - infinity (from the front of the lens)
|
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Construction
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9 elements
in 6 groups (2 aspherical lens elements with 2 surfaces)
|
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Filter
diameter
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40.5mm
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Zoom
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Digital
zoom
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4.0x (3.6x
for movies)
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Auto
resize zoom
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Approx.
5.9x (ＶＧＡ)
|
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Focus
Modes
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Contrast
AF-based multi and spot AF; MF; Snap; infinity (focus lock and AF-assist)
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Shutter
speed
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Photographs
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180 -
1/3200s (upper and lower limits vary according to shooting and flash mode)
|
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Movies
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1/30 –
1/2000 s
|
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Exposure
control
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Metering
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TTL-CCD
metering in multi (256-segment), center-weighted, and spot metering (TTL
metering with auto exposure lock)
|
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Mode
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Program
AE, aperture priority AE, manual exposure, shutter priority AE, move target
function
|
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Exposure
compensation
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Manual
(+4.0 to -4.0 EV in increments 1/3 EV or 1/2 EV), auto bracketing (-2 EV to
+2 EV in increments 1/3 EV or 1/2 EV)
|
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ISO
sensitivity (Standard Output Sensitivity)
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AUTO,
AUTO-HI, ISO200, ISO400, ISO800, ISO1600, ISO3200
|
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White
balance
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Auto /
Multi-P AUTO / Outdoors / Cloudy / Incandescent Lamp 1 / Incandescent Lamp 2
/ Fluorescent Lamp / Manual Settings / Detail; white balance Bracketing
|
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Flash
|
Range
(built-in flash):: Approx. 20 cm – 3.0 m (ISO auto) (from front of lens)
|
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Shooting
mode
|
Auto /
program shift / aperture priority / shutter priority / manual /scene (movie,
portrait, sports, landscape, nightscape, skew correction) / “My Settings”
|
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Continuous
mode
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Number of
pictures shot in Continuous (Picture Size: RAW)
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Noise
Reduction on weak or off: 4 pictures
Noise Reduction on strong, or MAX: 3 pictures
|
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Number of
pictures shot in M-Cont Plus (1 set)
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HI (1280 ×
856): 30 pictures (24 frames/sec.)
LO (4288 × 2848): 15 pictures (3 frames/sec.)
|
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Picture
quality*1
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FINE,
NORMAL, RAW (DNG) *2
|
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Image size
(pixels)
|
Photographs
|
16:9
|
4288×2416,
3456×1944
|
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4:3
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3776×2832,
3072×2304, 2592×1944, 2048×1536, 1280×960, 640×480
|
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3:2
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4288×2848,
3456×2304
|
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1:1
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2848×2848,
2304×2304
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Movies （24 frames/second）
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1280×720,
640×480, 320×240
|
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File size
(approx.)
|
RAW
|
16:9
|
NORMAL:
17,800 KB/frame,
FINE: 19,515 KB/frame,
VGA: 15,587 KB/frame
|
|
4:3
|
NORMAL:
18,387 KB/frame,
FINE: 20,157 KB/frame,
VGA: 16,124 KB/frame
|
|
3:2
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NORMAL:
20,946 KB/frame,
FINE: 22,967 KB/frame,
VGA: 18,337 KB/frame
|
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1:1
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NORMAL:
13,991 KB/frame,
FINE: 15,333 KB/frame,
VGA: 12,273 KB/frame
|
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L
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16:9
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NORMAL:
2,222 KB/frame,
FINE: 3,816 KB/frame
|
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4:3
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NORMAL:
2,315 KB/frame,
FINE: 3,960 KB/frame
|
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3:2
|
NORMAL:
2,615 KB/frame,
FINE: 4,493 KB/frame
|
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1:1
|
NORMAL:
1,761 KB/frame,
FINE: 3,009 KB/frame
|
|
M
|
16:9
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NORMAL:
1,475 KB/frame,
FINE: 2,509 KB/frame
|
|
4:3
|
NORMAL:
1,574 KB/frame,
FINE: 2,662 KB/frame
|
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3:2
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NORMAL:
1,744 KB/frame,
FINE: 2,968 KB/frame
|
|
1:1
|
NORMAL:
1,186 KB/frame,
FINE: 2,003 KB/frame
|
|
5M
|
4:3
|
FINE:
2,287 KB/frame
|
|
3M
|
4:3
|
FINE:
1,474 KB/frame
|
|
1M
|
4:3
|
FINE: 812
KB/frame
|
|
VGA
|
4:3
|
FINE: 197
KB/frame
|
|
Battery life
|
Based on
CIPA standard DB-90 : approx. 320 shots CIPA*3
|
Dimensions
(W × H × D)
|
Camera
unit only:68.7 mm × 57.9 mm × 50.4 mm(according to CIPA guidelines)
When mounted on the GXR body:113.9 mm × 70.2 mm × 55.6 mm (according to CIPA
guidelines)
|
|
Weight
(approx.)
|
Camera
unit only: Approx. 210g
When mounted on camera body: Approx. 410g (battery and SD memory card
included)
|
|
Operating
temperature
|
0 °C to 40
°C
|
|
Operating
humidity
|
90% or
less
|
|
Storage
temperature:
|
–20 °C to
60 °C
|
1 The
picture quality modes which can be set vary depending on the image size.
2 A JPEG
file is also recorded (the JPEG file may be a FINE- or NORMAL-quality file with
the same dimensions as the RAW file or a VGA file 640 × 480 pixels in size).
RAW files use the standard DNG format promoted by Adobe Systems Incorporated.
3 For
reference only; actual number of shots varies greatly according to how camera
is used. We recommend that you carry spare batteries when in use for extended
periods. (Shooting capacity was measured using CIPA-standard parameters. These
are only estimates; performance may vary depending on usage conditions.)
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